2751002 - C12 THE GEARS DO NOT ENGAGE
Reverse gear cannot be engaged sometimes| Results of the tests | ||||
| 0 | CONTROL UNIT ERRORS CHECK | All OK | Problems met | Operation |
|---|---|---|---|---|
Check that there are no control unit errors. In particular:
| Continue to Step 4 | Presence of one or more of the errors included in the list | Continue to Step 1 | |
| 1 | CHECKS ON FAULTS DETECTED | All OK | Problems met | Operation |
| Check the faults according to the See Test 2127I What to do for error in Selespeed control unit | Continue to Step 2 | Connections faulty (Electromagnetic brake error) | Repair/replace the wiringContinue to Step 2 | |
| The state displayed is not correct (Lever switch error - Lever check) | Check the connections, continuity of the wiring and the gear leverContinue to Step 2 | |||
| There is no change of state and/or the word 'ECO' is not displayed (Lever switch error - ECO button check) | Check the button and wiringContinue to Step 2 | |||
| 2 | SOLENOID VALVE REPLACEMENT | All OK | Problems met | Operation |
| If there is an electromagnetic brake error and no faults are detected at the connections/wiring, replace Op. 2127C54 and check brake operation | Continue to Step 3 | . | ||
| 3 | AFTER THE CHECKS ON THE FAULTS DETECTED | All OK | Problems met | Operation |
| Check that the fault is no longer present | End of diagnosis | The fault persists | Continue to Step 4 | |
| 4 | GEAR LEVER CHECK | All OK | Problems met | Operation |
| Check that the gear lever is working properly following See Test 2127L GEAR LEVER CHECK | Continue to Step 5 | The lever states displayed are not correct | Check the wiring and the switches/gear lever Repair/replace the part that is not working | |
| There is no change of state and/or the 'AUTO' button is not displayed | Check the switch and the wiring. Repair/replace the part that is not working | |||
| 5 | OIL LEVEL CHECK | All OK | Problems met | Operation |
| Check the oil level as described in See Test 2127B OIL LEVEL CHECK | Continue to Step 7 | Level below the Max reference | Top up the oil levelContinue to Step 6 | |
| Level above the Max reference | Reduce to the Max levelContinue to Step 7 | |||
| 6 | CHECK FOR OIL LEAKS | All OK | Problems met | Operation |
| Check that there are no oil leaks as described in See Test 2127C CHECK FOR OIL LEAKS | Continue to Step 7 | Oil leaks detected in the clutch assembly | Carry out the clutch bleeding procedure in active diagnosis using the ExaminerContinue to Step 7 | |
| Oil leaks detected in other parts of the hydraulic unit | Replace/repair the parts concerned, and top up the oil levelContinue to Step 6 | |||
| 7 | OIL PRESSURE CHECK | All OK | Problems met | Operation |
| Check the amount of oil present and continue with the topping upCheck the oil pressure as described in See Test 2127D OIL PRESSURE CHECK | Continue to Step 9 | Pressure < 40 bar | Continue to Step 8 | |
| 8 | ELECTRIC PUMP OPERATION CHECK | All OK | Problems met | Operation |
| Check the correct operation of the pump as described in See Test 2127E ELECTRIC PUMP OPERATION CHECK | Continue to Step 9 | Voltage below 11 V | Check the batteryContinue to Step 8 | |
| It is not possible to make gear changes from the lever | Activate the 'clutch bleed' service from the Examiner Plus or Smart to activate the pumpContinue to Step 9 | |||
| 10 | CHECK THAT THE CLUTCH IS NOT DRAGGING | All OK | Problems met | Operation |
| Check that the clutch is not dragging following See Test 2127K CLUTCH DRIVE CHECK | End of diagnosis | The clutch drags | Replace the clutch mechanism Op. 1810A28 Continue to Step 11 | |
| 11 | AFTER OPERATION ON CLUTCH KIT | All OK | Problems met | Operation |
| Check that the fault is no longer present | End of diagnosis | The fault persists | Contact Technical Service for further information on the problem | |